public JoinNode(IQueryPlanNode left, IQueryPlanNode right, ObjectName leftVar, Operator joinOp, Expression rightExpression)
: base(left, right)
{
this.leftVar = leftVar;
this.joinOp = joinOp;
this.rightExpression = rightExpression;
}
private Expression DoPrepare(Expression expression)
{
if (preparer.CanPrepare(expression))
expression = preparer.Prepare(expression);
return expression;
}
public SimpleSelectNode(IQueryPlanNode child, ObjectName leftVar, Operator op, Expression rightExpression)
: base(child)
{
this.leftVar = leftVar;
this.op = op;
this.rightExpression = rightExpression;
}
public TypeIsExpression(Expression expression, DataType typeOperand)
{
if (typeOperand == null)
throw new ArgumentNullException("typeOperand");
TypeOperand = typeOperand;
Expression = expression;
}
public AssignmentStatement(Expression member, Expression assignExpression)
{
if (member == null)
throw new ArgumentNullException("member");
AssignExpression = assignExpression;
Member = member;
}
public IList<CorrelatedVariable> Discover(Expression expression, ref int level, IList<CorrelatedVariable> list)
{
variables = list;
queryLevel = level;
Visit(expression);
return variables;
}
/// <summary>
/// Groups over the given columns from the child.
/// </summary>
/// <param name="child"></param>
/// <param name="columns"></param>
/// <param name="groupMaxColumn"></param>
/// <param name="functionList"></param>
/// <param name="nameList"></param>
public GroupNode(IQueryPlanNode child, ObjectName[] columns, ObjectName groupMaxColumn, Expression[] functionList, string[] nameList)
: base(child)
{
this.columns = columns;
this.groupMaxColumn = groupMaxColumn;
this.functionList = functionList;
this.nameList = nameList;
}
protected virtual Expression Visit(Expression exp)
{
if (exp == null)
return null;
switch (exp.ExpressionType) {
case ExpressionType.Negative:
case ExpressionType.Positive:
case ExpressionType.Not:
return VisitUnary((UnaryExpression) exp);
case ExpressionType.Add:
case ExpressionType.Subtract:
case ExpressionType.Multiply:
case ExpressionType.Divide:
case ExpressionType.Modulo:
case ExpressionType.And:
case ExpressionType.Or:
case ExpressionType.Smaller:
case ExpressionType.SmallerOrEqual:
case ExpressionType.Greater:
case ExpressionType.GreaterOrEqual:
case ExpressionType.Equal:
case ExpressionType.NotEqual:
case ExpressionType.Is:
case ExpressionType.Like:
case ExpressionType.Any:
case ExpressionType.All:
return VisitBinary((BinaryExpression) exp);
case ExpressionType.Conditional:
return VisitConditional((ConditionalExpression) exp);
case ExpressionType.Constant:
return VisitConstant((ConstantExpression) exp);
case ExpressionType.Variable:
return VisitVariable((VariableExpression) exp);
case ExpressionType.CorrelatedVariable:
return VisitCorrelatedVariable((CorrelatedVariableExpression) exp);
case ExpressionType.Call:
return VisitFunctionCall((FunctionCallExpression) exp);
case ExpressionType.Query:
return VisitQuery((QueryExpression) exp);
case ExpressionType.Subset:
return VisitSubset((SubsetExpression) exp);
default:
throw new Exception(string.Format("Unhandled expression type: '{0}'", exp.ExpressionType));
}
}
public static BinaryExpression Binary(Expression first, ExpressionType type, Expression second)
{
if (type == ExpressionType.Equal)
return Equal(first, second);
if (type == ExpressionType.NotEqual)
return NotEqual(first, second);
if (type == ExpressionType.Smaller)
return Smaller(first, second);
if (type == ExpressionType.Greater)
return Greater(first, second);
if (type == ExpressionType.SmallerOrEqual)
return SmallerOrEqual(first, second);
if (type == ExpressionType.GreaterOrEqual)
return GreaterOrEqual(first, second);
if (type == ExpressionType.Add)
return Add(first, second);
if (type == ExpressionType.Multiply)
return Multiply(first, second);
if (type == ExpressionType.Subset)
return Subtract(first, second);
if (type == ExpressionType.Divide)
return Divide(first, second);
if (type == ExpressionType.Modulo)
return Modulo(first, second);
if (type == ExpressionType.Exponent)
return Exponent(first, second);
if (type == ExpressionType.Like)
return Like(first, second);
if (type == ExpressionType.And)
return And(first, second);
if (type == ExpressionType.Or)
return Or(first, second);
throw new NotSupportedException();
}
public MultiColumnEquiSelectNode(IQueryPlanNode child, ObjectName[] columns, Expression[] values)
: base(child)
{
this.columns = columns;
this.values = values;
}
public ConstantSelectNode(IQueryPlanNode child, Expression exp)
: base(child)
{
expression = exp;
}
public SmallerOrEqualExpression(Expression left, Expression right)
: base(left, right)
{
}
public Expression PrepareExpression(Expression expression)
{
return Visit(expression);
}
public FunctionalSelectNode(IQueryPlanNode child, Expression expression)
: base(child)
{
this.expression = expression;
}
public DataType FindReturnType(Expression expression)
{
Visit(expression);
return returnType;
}
public ConditionalExpression(Expression test, Expression ifTrue)
: this(test, ifTrue, null)
{
}
protected UnaryExpression(Expression operand)
{
Operand = operand;
}
public IsExpression(Expression left, Expression right)
: base(left, right)
{
}
public LikeExpression(Expression left, Expression right)
: this(left, right, null)
{
}
public MultiplyExpression(Expression left, Expression right)
: base(left, right)
{
}
public EqualExpression(Expression left, Expression right)
: base(left, right)
{
}
public IList<Expression> Break(Expression expression)
{
Visit(expression);
return list;
}
public LikeExpression(Expression left, Expression right, Expression escape)
: base(left, right)
{
Escape = escape;
}
public bool Explore(Expression expression)
{
Visit(expression);
return aggregateFound;
}
public bool Inspect(Expression expression)
{
Visit(expression);
return hasSubQuery;
}
public SubsetExpression(Expression child)
: base(child)
{
}
public SubtractExpression(Expression left, Expression right)
: base(left, right)
{
}
public ExponentExpression(Expression left, Expression right)
: base(left, right)
{
}
public ConditionalExpression(Expression test, Expression ifTrue, Expression ifFalse)
{
IfFalse = ifFalse;
IfTrue = ifTrue;
Test = test;
}
public DivideExpression(Expression left, Expression right)
: base(left, right)
{
}
